Alcance
ISO/IEC TS 19568:2015 describes extensions to the C++ Standard Library (1.2). These extensions are classes andfunctions that are likely to be used widely within a program and/or on the interface boundaries between libraries writtenby different organizations.ISO/IEC TS 19568:2015 is non-normative. Some of the library components in this technical specification may beconsidered for standardization in a future version of C++, but they are not currently part of any C++ standard. Some ofthe components in this technical specification may never be standardized, and others may be standardized in asubstantially changed form.The goal of ISO/IEC TS 19568:2015 is to build more widespread existing practice for an expanded C++ standardlibrary. It gives advice on extensions to those vendors who wish to provide them.